RETS DMQL2查询问题

当我使用系统名称“proptype”时,我无法获取数据。

以下是我的DMQL2查询代码(使用PHRet):

 $search = $rets->SearchQuery(
        "Property",             // Resource
        tt_res,                 // Class
        "(dtlist=1990-01-01+), (proptype=1)",   // DMQL
        array(
            "Select" => "listno,taxes,taxid,status,premarket,ownertype,image,dtphoto,housenum,dirpre,street,dirpost,coordew,coordns,city,state,zip,nonstandaddress,latitude,longitude,proptype,style,listprice,agent,contact,contacttype,contactph1,totbathfull,totbathhalf,totbath,totbed,totsqf,publicremarks,taxid,taxes,dimacres,yearblt,featuresint,featuresext,dtlist,windows,heating,aircon,basmntfin,floor,proptype,lotfacts,roof,landscape,exterior,deck,patio,garage,capgarage,capcarport,inclusions,amenities,water,utilities,pool,zoningchar,cooling,heating,dtlist,schooldistrict,schoolelem,schooljunior,schoolprivate,schoolsenior,schoolother",
            //'Select' => *,
            "Format"    => "COMPACT",
            "Count"     => 1,
            "Limit"     => 99
        )
        );

如果我从搜索查询中删除(proptype=1),查询将返回数据。使用它(proptype=1),我得到以下错误:

Array ( [type] => rets [code] => 20203 [text] => Internal SQL error: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '1')))' at line 1 )

如果我输入(proptype='1'),我会得到以下错误:

Array ( [type] => rets [code] => 20203 [text] => Could not parse DMQL2 Query: Lookup PROPTYPE_16 defines no lookup type with value: ''1'' at or near position 94. [...(proptype= !-->'1')),((sta] )

根据我的理解,以及retsmd提供的信息,“proptype”或属性类型是LookupMulti(多值查找)解释类型。它还有6行,值为1-6。我不确定是否正确构造了查询的MultiValue Lookup。

有谁能帮我解释一下吗?我被难住了。